FANUC Spindle Amplifier Alarm Codes List

Tri Star CNC Services helps you diagnose and troubleshoot your FANUC spindle amplifier and other electronic components. If your CNC machine tool is throwing an error you need to track down the source of the problem—which isn’t always as easy as it sounds.

FANUC Parts We Service:

FANUC Alpha, Alpha i series & Alpha is series

FANUC AC Digital and Analog

FANUC AC Serial Interface

FANUC AC Series i & S

If you’ve tried everything, scoured every alarm code list you can find and still can’t get your part back in production, contact us today. You’ll get free over-the-phone support , and, if necessary, a quote for repairs or replacements.

After emergency stop signal input, the motor is accelerated without being decelerated. This alarm is issued also when the motor is not deactivated (the motor is not decelerated completely) when the acceleration/deceleration time (initial parameter setting: 10 seconds) has elapsed after emergency stop signal input.

In spindle switching control or output switching control, a mismatch between the switching request signal (SPSL or RSL) and the power line state check signal (MCFN, MFNHG, RCH, or RCHHG) continues during motor activation.

This alarm can be issued only when Dual Check Safety is in use. The alarm occurs if, in safety signal mode C (a guard open request was entered to open the guard), the spindle motor rotation speed exceeds entered to open the guard), the spindle motor rotation speed exceeds the safety speed.

Fanuc Spindle Amplifier 700 Alarm Codes

It is serial communication error while system is executing after powersupply on. Following reasons can be considered.1) Optical cable connection is fault or cable is not connected or cableis cut.2) MAIN CPU board or option 2 board is fault.3) Spindle amp. printed board is fault.If this alarm occurs when CNC power supply is turned on or whenthis alarm can not be cleared even if CNC is reset, turn off thepower supply also turn off the power supply in spindle side.

This alarm is generated when the spindle control unit is not ready forstarting correctly when the power is turned on in the system with theserial spindle.The four reasons can be considered as follows:1) An improperly connected optic cable, or the spindle control unit’spower is OFF.2) When the NC power was turned on under alarm conditions otherthan SU–01 or AL–24 which are shown on the LED display of thespindle control unit.In this case, turn the spindle amplifier power off once and performstartup again.3) Other reasons (improper combination of hardware)This alarm does not occur after the system including the spindle controlunit is activated.4) The second spindle (when SP2, bit 4 of parameter No. 3701, is 1)is in one of the above conditions 1) to 3).See diagnostic display No. 409 for details.

This alarm indicates in the NC that an alarm is generated in the spindleunit of the system with the serial spindle. The alarm is displayed in formAL–XX (XX is a number). Refer to 2.3 or 2.4 Alarms displayed onspindle servo unit .The alarm number XX is the number indicated onthe spindle amplifier. The CNC holds this number and displays on thescreen.

This alarm is generated if the system does not properly terminate amode change. The modes include the Cs contouring, spindle positioning,rigid tapping, and spindle control modes. The alarm is activated ifthe spindle control unit does not respond correctly to the mode changecommand issued by the NC.